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Advances in Materials Science and Engineering
Volume 2016, Article ID 3905625, 9 pages
Research Article

Morphology Controlled Synthesis of α-GaO(OH) Nanoparticles: Thermal Conversion to Ga2O3 and Photocatalytic Properties

Department of Mechatronics Engineering, Mevlana University, Ardıçlı Mah., Yeni İstanbul Cad. No. 235, Selçuklu, 42250 Konya, Turkey

Received 11 November 2015; Accepted 16 February 2016

Academic Editor: Peter Majewski

Copyright © 2016 Ayse Dulda. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Morphology controlled α-GaO(OH) particles have been synthesized via precipitation method which allows the tuning of relative growth rates of crystal facets. The effects of alkali addition rate and the type of alkali on the growth rates of the crystal facets during hydrolysis were also investigated. XRD and TG analysis confirmed that there was a phase transition from GaO(OH) to Ga2O3 when precursor sample was calcined to 750°C. The single phase α-Ga2O3 was obtained after thermal treatment of NaOH precipitated precursor, while β-Ga2O3 was formed when the urea or NH4OH precipitated precursor was calcinated. Furthermore, the thermal, spectral, and photocatalytic properties connected to the crystal structure and morphology were discussed.